Rope-thrusting shovel



Patented Slain: 126, i922.

WALTER r'EnRIs, on MILWAUKEE, Ann SVANTE R. w. M. BAG-ER, or sou'rn MIL- Continuation of application Serial No.

WAUKEE, WISCONSIN ASSIGNORS TO BUCYRUS' COMPANY, WISCONSIN, A CORPORATION OF WISCONSIN.

015 SOUTH MILWAUKEE,

ROPE-THRUZSTING SHOVEL.

This invention relates to .power exc'ava-;

tors, and more particularly, to power shovels in which power actuated devices are employed for effecting and controlling the shifting or thrusting action of the dipper handle.

The general aim of the present invention is to simplify and improve the construction and operation of devices of .thischaracter.

A more specific object is theprovision of I a simple ,and improved form of dipper thrustingdevice, capable of advantageous use in any type of power shovel irrespective of the character of prime mover with which the shovel may be provided. Another object is the provision of a dipper thrusting devicewhich,-though designed to utilize the working tension in the hoisting cable, may be actuatedfrom the power source, without necessarily requiring a rotation of the hoisting drum. i

Another object istheprovision of an improved dipper thrust gear actuable from the prime mover and of-such character that the dipper handle may be forcibly shifted in either direction without requiring the use of a reversing gear.

Another object is the provision of a dipper thrusting device in which a single cable associated with' the power unit may be employed for effecting a shifting of the dipper handle independently of the hoisting action of the hoist gear? 7 if" Another object is the provision of a dipper thrusting device that maybe operated and controlled from the hoisting and-dragline.

drums, such as are ordinarilyprovided in certain types of power excavators.

Other objects and advantages will later appear.-

One embodiment of the invention is illus- 322,261, filedseptember 8, 1919. This 1921. Serial No. 489,408.

application filed August 3,

trated in the accompanying drawings, in

which:

Figure 1 is a side elevation of a power shovel embodying the novel features of the present invention.

v F igure 2 is. a detail view on a larger scale of a portlon of the dipper thrust gear shown in Figure 1.

Figure 3 is a plan View of a portion of the boom and associated parts.

F igure 4 is a sectional view taken substantially along the line H of Figure 2.

For convenience of explanation, the in vention is shown and will be described as embodled ijna power shovel having alongitudinally shiftable dipper handle, although is applicable, with little or no modification, to shovels, of that type in which the dipper handle is shiftablehorizontally.

This application is a continuation of our copending application, Serial No. 322,261, filed September 8, 1919, the power shovel shown and described herein being substantially identical with that disclosed in the application just mentioned. This shovel includes a wheeled truck 10, providecLwith a turntable 11, supporting a rotatable platform 12, is the usual manner. A hoisting winch 13 is mounted upon the platform 12. The hoisting winch is driven from any suitable power unit (not shown) through an appropriate gearing, a portion of which is. shown at 14. The hoisting winch includes a main drum 15 and an auxiliary drum 16, such, for instance, as are commonly employed as hoisting and dragline drums in some well'knowntypes of power excavators. .These drums are mounted for independent rotation, each being independently actuated through thegearing 14, and each being controlled by individual clutch and brake mechanisms (not shown) of any standard or approved construction.

A boom 17 is pivotally mounted, as at 17, upon the platform 12. A .cable 18 and sheaves 19 are employed in the usual manner for adjustably supporting the boom in any desired position of inclination. The boom carries the usual dipper 20, and dipper 'handle 21,- in such mannerthat the dipper handle is permitted both a swinging and shifting movement. In this instance, the dipper handle is mounted for lengthwise movement in the pivoted saddle blocks 22,

and is provided with the usual racks 23 for engagement with the gears 24secured to the shipper shaft 25. The shipper shaft is rotatably mounted in fixed bearings 26 se means for effecting and controlling the shifting or thrusting action of the dipper handle. This is accomplished by the use of novel cable connections between the dipper handle and the main power unit. Theseconnections are such that by drawing in one -line of cable the dipper handle is shifted in. one direction, means being provided for opposing this action of this line of cable, to shift the dipper handle in anotherldirection when this line ofcable is paid out. The arrangement is preferably such that the dipper handle may be shifted in either direction, either duringthe hoisting or the lowering of thedipper.

This may be accomplished in various I ways, but in the type of shovel shown wherein the shipper shaft 25 is geared to the dipper handle, this shifting .or' thrusting of the dipper handle may be convenior otherwise fixed thereto.

ently effected through the shipper shaft. In the shovel shown, therefore, the'shipper shaft is provided with a drum 29-heyed This drum is connected with the auxiliary drum 16 hereinabove referred to by means of a cable 23. One end of cable 28 iswrapped' about and" anchored upon drum- 16,;while the other end is wrapped about and anchored upon the drum 29. .The arrangement is such that, when this cable is "drawn in, under the action of the drum 16, the drum 29 and shipper shaft 25 arerotated and the dipper 'handle is thrust in one direction, under .in various ways with this end in view.

the action of the gears 24 and racks 23. In the shovel illustrated, the cable 28 is wrapped about the drum 29- in such direction as to produce an inward thrust on the dipper handle when this cable is drawn in.

arious provisions may be made whereby this action of the cable 28 is opposed, so that when this cable is paid out the dipper handle is shifted in the other direction. In this instance, the tension in the dipper hoisting cable 31 is utilized for this purpose. The hoisting-"cable may be arranged in the shovel shown, however, this cable 31 is connected with the hoisting drum. 15 in the "usual manner, while the other end is seso as to form in effect a continuation of the cable 28. Cables 31 and 2.8 will be hereiniaeaeee after referred to as separate cables because of their distinctive functions, although they may or may not in fact constitute portions of one and the same cable. Cable 31 extends from the drum 1-5 over a sheave 32,

preferably mounted adjacent the outer end of the boom 17, through a padlock-sheave 33, connected with the dipper, andthence back'over a sheave 34. to thedr-um 29 The cable 31 is thusmade to support the dipper. and the resulting tension therein is made to oppose the tension in the cable 28'.

The zcable' 3l, under the 'act-ion of the hoisting drum 15, performs its 'usual functions of raising and lowering. the dipper and swingingf-t'he dipper handle 21 about the shipper shaft 25. I In addition, however,

the tension inthis cable-is made to oppose the tension in the cable'28, "so that when the drum 16 is'rotatedjto pay out the cable 28, the-dipper handle is forced in a direction opposite to that in which it is moved when the cable 28 is drawn in. ,Thus-it will be seen that the dipper handle is always under the control of the drum 16 and that it may be forced in either direction without requiring rotation of the hoisting drum Furthermore, the dipper may be raised or lowered at will by, the hoisting drum 15,

in the usual manner.

To illustrate the operation of the shovel described, assume that'the dipper is in the lower digging position, such as illustrated in dotted lines in Figure -1, and that the drum 16 is held by its; brake against rotation. Upon rotation. of the hoisting drum 15in a clockwise direction, the hoisting cable 31 is drawn in, the dipper is raised, and the dipper handle swung about the shipper shaft. As long as the-drum i6 is held against rotation the shipper shaft does not rotate a nd the dipper handle is :held against outward shifting movement. If it is desired to force the di per-Trore firmly against the bank, this is accomplished by releasing the drunrlti' to pay out the cable 28. This permits the shipper shaft to'rotate under the influence of the tension in the cable 31 and the dipper handleis forced outwardly. If, onthe other hand, it is desiredto reduce the bite by withdrawingthe dipper from the bank, it is only necessary to rotate the drum 16 in a clockwise direction so as to draw in the cable 28.

This action effects a rotation of the shipper shaft against the influence ofthe cable 31 in such direction as to shift the dipper handle inwardly. I When the excavating movement has been to the dotted line position, it is only necessary to release the drum so as to pay out the cable 31 and thus lower the dipper, and to rotate the drum 16 in a clockwise direction so as'to thrust the dipper handle inwardly to the position shown.

It will be noted that by the mechanism above specifically described, in which the dipper is supported from a point between the ends of the cable 31 andin which, the ends of this cable are independently controlled by the drums 15 and 16, respectively, the dipper may be raised or lowered a working platform, a boom carried thereby,

slightly by a manipulation of either of the drums. i

Various changes may be made in the embodiment of the invention hereinabove described, without departing from or sacrificing any of the advantages of the invention as defined in the following claims.

We claim:

1. A rope thrusting shovel comprising a working platform, a boom carried thereby, a driving mechanism supported thereon, a dipper handlemounted for rotation on the boom, a dipper on the end thereof, a ship- .per shaft adapted to move the dipper handle longitudinally, a drum, on the shipper shaft, a pair of winch drums on the working platform, two cables wound about the drum on the shipper shaft and leadin one of them directly to one of thewinch rums on the working platform, the other to thedipper and thence back to the other'winch drum on the workin platform, and means for manipulating bot of said cables.

2..A rope thrusting shovel comprising a working platform, a boom carried thereby, a driving mechanism supported thereon, a dipper handle mounted for rotation on the boom, a dipper on the end thereof, a shipper shaft adapted to move the dipper handle longitudinally, a hoisting winch on the working platform, a cable having two ends, each of them separately controlled by the hoisting winch the bight of the cable being associated with the dipper and one side of the cable being associated with and adapted to control the shipper shaft.

3. A rope thrusting shovel, comprising a driving mechanism supported t ereon, a dipper handle mounted for rotation on the boom, a dipper on the end thereof, a shipper shaft adapted to move the dipper handle longitudinally, a drum on the shipper shaft, a hoisting cable wound about the drum at one end. the bight of the cable being connected-to the dipper, and means'for controlling the other end of the cable and means for controlling the rotation of the drum.

4. A rope thrusting shovel, comprising a working platform, a boom carried thereby, a driving mechanism supported thereon, a dipper handle mounted for rotation on the longitudinally, a drum on the shipper shaft,

a hoisting cable wound about-the drum at one end, the bi ht of the cable being connected to the ipper and means for controlling the other end of the cable and means for controllingthe rotation ofthedrum, said means comprising a cable wound thereabout and means for manipulating it. v

5. A rope thrusting shovel, comprising a working platform, a boom carried thereby, a driving mechanism supported thereon, a dipper handle mounted for rotation on the boom, a dipper on the end thereof, a shipper shaft adapted to move the dipper handle longitudinally, a hoisting cable for the dipper associated with the shipper shaft to rotate the shipper shaft in 'one direction only, and means for rotating the shipper shaft in another dif'ection to control the longitudinal movement of the dipper handle.

6. Means for operating an excavator dipper comprising. a boom, sheaves at the end thereof, a saddle block pi'votedvto the boom, a dipper handle sliding in the saddle block, means for thrustin and retracting said dipper handle, including a shipper shaft associated with the dipper handle, .a drum thereon, and two independently operated cables, one of them being passed over the sheaves and about the drum and anchored thereon so as to simultaneously tend to hoist and extend the dipper, the other cable being passed directly about and anchored on the drum so as to resist rotation :thereof under the tension of the first cable.

- 7. A rope thrusting shovel, comprisin' a working platform, a boom carried there y, a driving mechanism supported thereon, a

dipper handle mounted for rotation on the boom, a dipper on the end thereof, a shipper shaft adapted to move the dipper handle longitudinally, means for simultaneously raising the bucket to-cause it to, excavate and rotating the shipper shaft to force the bucket against the work, and means for controlling and limiting the movement of the bucket toward the work, said last named means comprising a separate line wound about the shipper shaft. 7 1

'8. In a power shovel, means for thrusting the dipper against the'work, comprising a dipper handle, a shipper shaft associated with it, a drum thereon and cables wound thereabout in opposite directions and extending away from the drum and separate means under control of operator for controlling the operation of said cables/1 9. In a power shovel, means for thrusting the dipper against the work, comprising a ing away from the drumfone of said cables being associated with the dipper as a hoisting cable, and separate means under control of operator f orcontrolling the operation of said cables. T Ofln a power shovel, means for thrustthe dipper against the'work, comprising 1 f a dipper handle, a shipper shaft associated with it, a drum thereon} and cables wound thereabout in opposite d rections and extending away from the drum, a plurality of I hoisting drums, the flexible ends of each of both of'said drums to take up the cablessaid cables being wound thereabo'ut, one of said cables leading directly to its hoist drum, the other being intermediate its ends associated with the bucket as a hoisting cable, means for independently rotating and means for limiting and controlling the;

rotation of the drums in the opposite direction to controlthe paying out of the cables.

11. In an excavating shovel,- a bucket, a slidably1 dle, a

ing the bucket intothe Work, andfmeans for resisting the thrusting action of said first named means to "limit and control the resultin -j movement of the bucket toward the work, said hoisting and resisting means being separately controlled "by the operator.

dipper handle mounted thereon for-swing ing and shifting movements and biased to- "12. ln a power'shovel having a dipper,

the COIIlblIlfltiOn'Of means for thrusting the dipper against thework and' for retracting it therefrom, comprising a shipper shaft, a drum-thereon, and cables 'W0l1nd upon said drum and tending to rotate the drum in opposite directions, one otsaid cables being the'hoisting cable,-the hoisting and thrusting being separately :controlledby the operator.

v 13. A shovel having a boom, adipper and dipper handle mounted thereonfori-s'winging and shifting movements a-hoisting 45 drumassociated with 'said' dipper and dipper handle for effecting a swinging movement thereof, means including a eableloperableindependentlyof saidi d'rum for ef- 'fecting a shifting movement, of said-handle in one direction when said cableis drawn .in, and means-opposingy-theaction-o t said cable for efiecting afshifting movement [of said handle in another jdirectiongwhen said cable is paid out, p j

14:. A shovel having a boom, a dipper and ward shifting. .movement in" one 'direction only, independently. of Whether said dipper is being :raised or lowered, and means including a cable for 'bontreliing such shift ing movement and foreiiecting a shifting movement of said dipper-handle in another direction.

and rotatably mounted bucket han oisting cable for the bucket-,means operated by the hoisting cable for-thrust 15. A shovel havmga a dipper and dipper handle mounted thereon for swinging and shifting movements and biased toward outward shifting"movement independently of whether said dipper is. being raised or lowered, and means including .a cable for controlling'such shifting-movement and for effecting an inward shifting movement oi' said dipper handle, Y

' 16. it power shovel having an excavating dipper providedwit-h a. handle, a hoisting ment of saidhandle in one direction only, and means opposing the shifting action of said hoisting apparatus to control such shifting movement and to shift said handle in.

rotatable drums, means including a line of cableconnected with one of said drums for shifting said handle in one direction only,

and means including another lineof cable connected with the other of said drums for shifting said handle in another. direction only.

19. A power shovel havinga boom, a dipper having adipper handle-mounted thereon for swinging andshifting movements relative thereto, two independently rotatable drums, means; inclhdii g a line of'cable connected with onev of said drums for shifting said handle in one direction only, and means including another line of cable connected with the other of said drums for shifting said handle in another directionfonly. i

20. A power shovel having a'boom, a dipper having a dipper handle mounted thereon for swinging and shifting movements relative thereto, means including a drum on said-boom foreil'ecting and controlling the shifting movements of said handle, two ad} 'ditional drums, a line of cable connecting i said first named drum] with one of-saidflast "named drums for eileciting rotation of said first named drumin' one direction, and'a line of cable connecting said first named drum with-the othen of saidlast named drums for effecting rotation oi -said first named drum in another direction. I

-21. A power shovel having a dipper pro-.

vided with a handle mounted for sv'vinging and shifting movements, means including a line of cable operable under the weighto'f ,"apparatus' for hoisting and lowering said" dipper and for-effecting a shifting moveice said dipper to shift said handle in one direction, means including another line of cable opposing the shifting action of said first named means for controlling such shifting movement and for shifting said handle in another direction, and independently controlled means for actuating said lines of cable.

22. In a device of the character described, the combination of a boom, a dipper carried thereby, a drum on said boom connected with said dipper, a hoisting drum, a line of cable connecting said drums, said dipper being connected with said cable at a point thereon between said drums, so that the tension in said cable tends to shift said dipper in one direction, and means operable on said first mentioned drum for shifting said dipper in another direction.

23. In a device of the character described,

the combination of a boom, a dipper handle having a dipper carried by said boom, a

- drum on said boom connected with said dipper handle, a hoisting drum, a line of cable connecting said drums, said dipper handle and dipper being connected with said cable at a point thereon between said drums so tha-t'the tension in said cable tends to shift said handle in one direction, and means operalble on said first mentioned drum for shifting said handle in another direction.

24. A power shovel having an excavating dipper, means including a cable for supporting said dipper, means for drawing in and paying out one end of said cable to raise or lower said dipper, and means cooperating with the other end of said cable for advancing or retracting said dipper;

25. A power shovel having a hoisting cable, means for independently controlling the opposite ends thereof, and a dipper associated with said cable at a point intermediate the ends thereof to maintain a, working tension therein, said means being rendered effective by such working tension to advance said dipper toward the Work or to retract it therefrom.

26. In an excavating shovel, a bucket, a.-

slidably and rotatably mounted bucket handle, a hoisting cable for the bucket, means responsive to the-weight of thebucket upon the hoisting cable for thrusting the bucket into the work, and means for resisting the thrusting action of said first named means, 

